Device for producing high-frequency oscillatory currents.



F. JAGOVIELLO. DEVICE FOR PRODUCING HIGH FREQUENCY OSCILLATOR}! OURBENTS.

APPLIOAT IOH FILED MAR. 12, 1910.

1,004,170, Patented Sept. 26, 1911.

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\NVENTQR FELLCIE J meow E LLO',

Attorney UNITED STATES PATENT OFFICE, i

I I I I ranrca .rhcovrnrno, or name, Imam. DEVICE FOR PROD'UCIIQG' HIGH-FREQUENC'Y QSQILLATORY CURREN'IS.

A Specification of Letters Patent. Patented Sept. 26, 1911. Application filed March 12, 1910. Serial No. 648,028. I

. tial electric are into which a gas et 1s sent in the same direction as the direction of the arc, the device also comprising means for obtaining the said gas jet, consisting in tubular electrodes the ends of which have small holes or ports through which the gas is discharged with more or less high speed.

My said device difiers from similar known devices, such as Poulsens, for instance, by the following features: 1. The difference of potential at the ends of the arc is comparatively high, so as to generate between them an electric field of about 10,000 volts for one centimeter: 2. For the magnet is substituted a gas jet, the gas of which moves in the same direction as the arc, or preferably the path of the gas molecules is approximately in the girl'gction of the lines of force of the electric In order that my said invention may be better understood, I have illustrated the same by some examples in the annexed drawmg wherein:

Figure 1 is a central longitudinal sectional view of a form of the device adapted for average potential. -Fig. 2 is a central longitudinal sectional view of an electrode for low potential. Fig. 3 is a similar view of an electrode for high potential. Fig. 3 is a side elevation of another form of electrode for high potential, and Fig. 4 is a central vertical sectional view of a substantially complete device for average or low potentiball, and in which the electrodes are replacea e.

Referring to Fig. 1, A and A designate two tubes with coinciding axes constituting the two electrodes of the arc, the opposing ends of the tubes being closed by circular pieces B and B so as to leave two annular spaces, between them and the tubes. The said two tubes are tightly fitted into a box C of a material resistant to high temperatures,

the

.and electrically insulated, at least in the perimet'rical part. The opp ed faces of the pieces B and B are concaveid in the case of ieces being formed of Eonductive materia The tube A is cooled-by the gas current itself, while the tube A, which carries the hot gases away, is advanta eously cooled by still or circulating water. y compress ing a gas in tube A and exhausting the same in tube A an annular as current in the .di-

rection of the arrow is generated between the two opposed ends of the tubes. By producing the spark between A and A during the gas current, the arc will occupy the position E of the said current. In order to produce the electric waves the arc is put in the same conditions as the one used for producing high frequency currents. The simplest arrangement for wireless telegraphy will consist in connecting one electrode with an antenna, and the other with the ground. With small powers the box C may be dispensed with.

s shown in Fig. 2, the tubular electrodes A may terminate in small holes a. The electric arc in this case is incorporated with the cylindric gas jet discharged from holes a and terminating at the opposed electrode. In' the form of the invention shown in Fig. 3, the opposed ends of the tubular elec trodes A insteadof terminating with annular ports may be provided with a plurality of holes and having metallic parts surrounding the holes in "relief, and the other part concaved. The number of holes will de end from the potential of the arc. In or er that the op osite ends of the electrodes may terminate with a great number of holes, pieces of very fine wire gauze G' may be fitted thereto, or pieces simllar to those used on' the top of certain special Bunsen burners for causing the gas to pass a great number of holes and burn in a reat number of small flames, as shown in ig. 3. When dealing with very large arcs the said ends may terminate by a series of arallel ports and the tube instead of cylin ric may be 0t any other form. Fig. 3 shows a section of I one of the said ends with five arallel ports a. A greater number of annu ar ports may also be used, though such an arrangement would present some difiiculties.

In the form shown in Fig. 4, the tubes A. and A are provided with modified electrodes S and S so formed and placed as to be readily replaced as they become consumed,

and that they may be moved toward and away from each other in wireless telephony and tele'graphy; In the said Fig. 4, M designates a sleeve of insulating materlal, holding s aced apart metallic disks N, N supporting t eitubes A, A, the disks being eld in place'by rods R electricall insulated from the disks, by bushings G, i the disks are of metallic material. A desi ates the tube through which the gas is ischarged, and A," that through which the gas is exhausted. Inforderto, form at the endof the electrode 1 S the annularspace through which the gas is discharged at hi h speed, a small'tube T vhis of metallic or insu ating material is placed concentrically therein, said tube/being closed at least at the end at which the gas is admitted. The electrode s' is in linewith the electrode S and is open at its ends; and is 'enterrinto tube A.

, rounded by'another tube U terminating at the to inv a hopper V. The space between kept loosely in place in the desired position in tube A by three small spurs placed on the equidistant generatrixes of the cylinder.

The gases on being discharged from the annular spaces of the electrode. S meet with the electrode S both outside and inside, and

The tube A .is surthe tu s U and A and even portion of the hopper is filled with water in order to 0001 the top of the apparatus. Both electrodes S and S may be readily replaced, electrode S being kept in place by screws, while on the contrary the electrode S is loosely held in lace and prevented from being carried 01?; jet by throttling the upper part y the gas of the tube.

Having now fully describedmysaidin-; vention and the" manner in which the same I is toube Operated I declare that what. I'claim as y vention j,

1. A device for producinghigh f requency I oscillatory currents, comprlsin o posed-tubular electrodes through one o. w 1ch gas is discharged in the form of a jet, and through the other of which the jet is exhausted, said electrodes being adapted to carry, therebetween an arc in the same direction as the jet;

A device for producing high frequency osclllatory currents, comprisin opposed tufdischarged in the form of a jet, and through the other of which the jet is exhausted, sa d electrodes being adapted to carry therebesaid electrodes being formed of conductive material and. having their opposed ends,

tween an arc in the same direction as the jet,

formed with holes for the passage of the gas.

3. A device for producing high frequency oscillatory currents, compr1sin opposed tu- In testimony whereof I have afiixedmy' signature in presence of two witnesses.

I i EELICE JACOVIELLO. Witnesses:

DUILIo' NARDONI, W. H. Bnmuqmv.

Q50 bular electrodes through one 0 which gas is 

